Setts



(No Model.)

S. A. WOODS & J. B. THOMAS.

LOO$E PULLEY. No. 388,942. Patented Sept. 4, 1888.

INVENTOR,

ATTORNEY,

lhvrrnn STAT-ES n'rnsrr Orricn.

SOLOMON A. W'OODS AND JOHN R. THOMAS, OF BOSTON, MASSACHUSETTS,ASSIGNORS TO THE S. A. \VOODS MAOHTNE COMPANY, OF MASSACHU- SETTS.

LOOSE PULLEY.

SPECIFICATION forming; part of Letters Patent No. 388.9%2, datedieptember 1888.

Application tiled March 21, 1888. Serial No. 268,037.

To rtZZ 1117mm 72mg concern;

Be it known that we, SOLOMON A. Woons and J our: 11. THOMAS, both ofBoston, in the county of Suffolk and State of Massachusetts,

have invented a certain new and useful Improvement in Loose Pulleys, ofwhich the following is a specification.

Our invention relates to loose pulleys for shading; and it consists incertain new and in useful constructions and combinations of the severalparts thereof, substantially as herein after described and claimed.

In the drawings, Figure l is a face view of a loose pulley constructedaccording to our ini5 vention. Fig. 2 is a transverse section throughthe axis of the same.

A is the rim of the pulley,on which the belt runs. From the inner sideof this rim aweb, 13, projects inward toward the axis, and upon theinner edge of this rim is cast the reservoir 0 around the axis, andhaving a tubular axial hole through its center to receive the shaft onwhich it is to run. The web 13 is a mere central extension inward of therim A, which 2 is employed to enlarge the diameter of the pulley withoutenlarging the reservoir 0, and in small pulleys the rim will be castdirectly on the outer periphery of the reservoir. This reservoir 0 has acentral radial flange, 0, ex-

tending inward from opposite to flange B toward the center of thepulley. In flange a, near its exterior edge, holes 0 c are made throughit. The walls of reservoir 0 terminate on each side in tubular sleeves cc concentric 5 with the rim A, which support the pulley upon its shaft.Into these sleeves from each end are driven the tubular metalbushings (Zd, and each of these bushings has upon its inner side a groove leadingfrom its inner end to a 0 hole extending diagonally through the wall ofthe bushing and wall of reservoir 6 into the latter, and through thisgroove and hole the winking w is drawn, so that its ends project fromthe groove and hole into reservoir 0, as

5 shown.

It will be observed that the flange 0 projects radially inward from theperiphery of the oilreservoir 0 toward the exposed part of the shaft Swithin the reservoir, upon which shaft (No model.)

the pulley revolves. This construction is cs sential in order to enablethe film of oil which flows along the faces of the flange c to reach thesurface of the shaft, and flow longitudinally along the same between itand the bushings (Z, which support the pulley at the ends of thereservoir upon the shaft. The reservoir C is made with its end wallsconcave and inclined toward each other and radially outward from whereits bushings bear upon the shaft S, in order that the centrifugal actionof the rotating pulley upon the oil may tend to keep it within thereservoir and from escaping between bushings (Z (Z and shaft S; and ifit were not for flange c, which conveys the film of oil radially inwardfrom this part of 6 the reservoir, so that it may reach the shaft again,the oil would by this form of the reservoir be kept substantiallyentirely away from the shaft-bearings. The inwardly-projecting flange cis shown as touching the shaft S at the central part of the flange, andwhile this construction is preferred it may be made to not quite touchthe same with good results. The oil-reservoi r O is constructed ofannular form to allow the oil to flow freely around its outer periphery,unchecked by any transverse partitions extending in a direction parallelto the shaft. This construction allows of the great body of the oilbeing held in the outer part of the reservoir and prevented fromcscaping until it is gradually taken up and supplied to the shaft S, asbefore described, by the flange 0.

Inside of the bushings d, the tubular shaft S is introduced. Thistubular shaft is attached firmly to the countershaft by set-screws n n,which pass through collars in m of it, one of the collars, m, beingremovable and held in place by the set-screw, which holds it in place,as well as aids in securing the tubular shaft to 0 the counter-shaft.The shaftS thus becomes a part of the counter-shaft on which the pulleyruns, and with relation tothe pulley-bearings and reservoir itco-operatcs the same as if it were a solid shaft. A thumb screw, c, istapped through the wall of reservoir O and serves to stop the holethrough which oil is supplied to the latter.

By the form of construction of the pulley described we are enabled tocast it with the rim A, flange B, reservoir G, and sleeves 0 0 all inone piece, thus leaving no seam or joint for the escape of oil throughthe outer shell of the reservoir.

When the counter-shaft is inserted through tubular shaft S, and thelatter secured to it by the set-screws and oil is supplied to thereservoir O, the oil will be thrown outward by centrifugal force as thepulley revolves upon its tubular shaft; but a slight film of oil willcling to the faces of flange cand drip upon the shaft S and work intothe bushings d d, lubrieating the bearings upon which the pulley runs.Any excess of this oil will be arrested and conveyed back into thereservoir 0 by the wicking 20, which wipes up the excess of oil, so thatit cannot escape from the outer ends of the bushings d d. The flange coperates best when it almost or quite touches shaft S, as shown, andevery time the pulley is stopped it causes the oil adhering to itssurface above shaft S to drop upon the latter.

It is evident that the bushings d (I might be omitted and the sleeves cc be made to bear directly upon shaft S; or the latter might be madesolid or in one piece with the countershaft. We prefer to employ thebushings, however, as the axial holes through sleeves 0 can thus be madelarger and a better opportunity afforded to ciean the casting sand outof the reservoir 0, and the bushings can be made of Babbitt, while thepulley is of iron.

By using the tubular shaft S, the same-sized bore of the pulley can beemployed with different diameters of counter shafts, thebore of .thetubular shaft being varied to suit the counter shaft.

\Vhat we claim as new and of ourinvention 1. The combination of a loosepulley having the rim A, the annular reservoir 0 within the same, thetubular bearings d d, placed in the ends of the reservoir with a spacebetween them, and the annular flange 0, projecting radially inward fromthe outer part of said reservoir toward the shaft opposite said space,with the shaft S passing through said bearings and flange, whereby aportion of the surface thereof within the pulley-reservoir between saidbearings is exposed to receive oil conveyed thereto by said flange,substantially as described.

2. The combination of a loose pulley having the rim A, the annularreservoir 0 within the same, the tubular bearings d (I, placed in theends of the reservoir with a space between them, and the annular flange0, provided with hole 0 through the same and projecting radially inwardfrom the outer part of said reservoir toward the shaft opposite saidspace, with the shaft S passing through said bearings and flange,whereby a portion of the surface thereof within the pulley-reservoirbetween said bearings is exposed to receive oil conveyed thereto by saidflange, and the oil may pass through hole a during the operation,substantially as described.

3. The combination of a loose pnlleyhaving the rim A, the annularreservoir O,surrounded thereby, the tubular bearings d d, placed in theends of the reservoir with aspace between them and provided withinternal grooves and holes supplied with wiclsing w, and the annularflange 0, projecting radially inward from the outer part of saidreservoir toward the shaft opposite said space, with the shaft S passingthrough said bearings in contact with said wicking and through saidflange c,whereby a portion of the surface thereof within thepulley-reservoir between said bearings is exposed to receive oilconveyed thereto by said flange, and the excess of said oil passingwithin said bearings is wiped off from the shaft and prevented fromescaping, substantially as described.

4. A loose pulley having the rim A, flange B, annular reservoir 0 withinsaid rim and flange, radial internal dividing-flange einsaid reservoir,andsleeves c all cast in one piece without seam or joint in thereservoir, and having its .shaftbearings formed by the separate bushingsd d, secured in said sleeves e 0 upon each end, substantially asdescribed.

5. The combination of a loose pulleyhaving the rim A, the annularreservoir O, surrounding its shaft within the rim, and formed of greaterinternal diameter at its central portion than that adjacent to its endhearings on the shaft,theindependenttubularshaft-bearings at each end ofthe reservoir witlran open space within the latter between them, theannular flange c, projecting radially inward from the outermostpart ofsaid reservoirtoward theshaft opposite to said space, with the shaft Spassing through said bearings and flange, whereby a portion of thesurface thereof within the pul' Icy-reservoir between said bearings isexposed to receive oil conveyed thereto by said flange, and the oil iscarried to the central and outermost part of the reservoir against saidflange and away from the shaftbearings by the rotation of the pulley,substantially as described.

6. A loose pulley having the rim A, annu lar reservoir 0, surroundingits shaft, radial flange c, dividing said reservoir, and tubularbearings d d, in combination with the tubular shaft S, provided withfixed collar m and detachable collar m and the set-screw passing throughthe latter and the shaft and adapted to hold the collar m upon thetubular shaft and secure the latter to the counter-shaft, substantiallyas described.

SOLOMON A. WOODS. JOHN R. THOMAS.

\Vitnesses:

DA ID HALL RICE, N. P. Ocxrnerron.

